stawfik: Do the spreaders come individually packages in boxes? If yes, then I would wrap the box and place the jam on top of the box with double sided tape. You can cover the lid with gingham, any fabric of your choice, or kraft paper tied with cord.

If the spreaders are not individually packaged, I would tie the spreader vertically to the jar of jam just under the lid . Wrap the cord or ribbon once around the spreader before you tie it around the jar to keep it from slipping out.